[Epidemiological studies of non-A, non-B hepatitis].
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006526:Hepatitis C / Q000453:epidemiology*; D006525:Hepatitis, Viral, Human / Q000453:epidemiology*; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged